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Finding the Fourth Proportional to 803.55, 1,110.21 and 606.72

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Solution

The fourth proportional to 803.55, 1,110.21 and 606.72 is: 838.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.55 : 1,110.21 = 606.72 : x
  2. Step 2: Convert to fraction form
    803.55/1,110.21 = 606.72/x
  3. Step 3: Cross multiply
    803.55x = 1,110.21 × 606.72
  4. Step 4: Simplify right side
    803.55x = 673,586.61
  5. Step 5: Solve for x
    x = 673,586.61/803.55
  6. Step 6: Final answer
    x = 838.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.